The division of (4+5i) / (2-4i) is performed by multiplying the numerator and denominator by 2+4i and the result of the given expression is (-3/5) + (13/10) i
The given expression is
(4+5i) / (2-4i)
Here we have to divide the given complex number
First multiply both numerator and denominator by 2+4i
(4+5i) / (2-4i) × (2+4i) / (2+4i)
= [tex]\frac{(4+5i)(2+4i)}{(2-4i)(2+4i)}[/tex]
Multiply the terms in the numerator and denominator.
= [tex]\frac{8+16i+10i-20}{2^2+4^2}[/tex]
= (-12+26i) / 20
= (-12/20) + (26/20)i
Divide both numerator and denominator by common terms
= (-3/5) + (13/10)i
Hence, the division of (4+5i) / (2-4i) is performed by multiplying the numerator and denominator by 2+4i and the result of the given expression is (-3/5) + (13/10)i
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An item is regularly priced at $45. It is on sale for 60% off the regular price. How much (in dollars) is discounted from the regular price?
Answer:
$27.00 is discounted from the price.
Step-by-step explanation:
60% means per hundred
60/100 when you divide by 100 you move the decimal 2 places to the left
.6 x 45 = 27
Regarding the search-and-replace features provided by the find and replace dialog box, what is not true?.
You cannot replace a type of formatting inside a cell with a different type of formatting.
Your search string is treated as a pattern by the dialog box, which then returns all records that do. Consider the case where you have a datasheet (a table or a query result) with details on clients, vendors, goods, and order dates. The find operation returns all occurrences of "mar" when you perform a search, along with any additional entries that meet the pattern you supplied.
The dialog box doesn't scan the full database; it simply searches one table at a time. You can search the table that supports a form if the dialog box is opened from within one.
For some features provided by the Find and Replace dialog box the search and replace feature can't accept the following condition.
That a user cannot replace a type of formatting inside a cell with a different type of formatting.
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can someone tell me how many cds in both columns combined be?
Answer:
2021= 700cds 2020=750cds
Step-by-step explanation:
Puedes ver como indica en el lado izquierdo que la barra de cds de el 2021 esta en la mitad de 800 y 600 que es igual a 700 cds en 2021
Y en la parte del 2020 se ve que este en la mitad de 800 y 700 considerando el calculo anterior por lo que daría 750 cds en 2020
Copyright © McGraw-Hill Edi
7. The table shows the options Zoe's mother
has for buying tickets to an adventure day
camp for Zoe and 5 of her friends. Which
option has the lesser cost per student
ticket? (Example 2)
Adventure Camp Tickets
Option
6-pack of Student Tickets
Individual Student Ticket
Cost ($)
126.00
21.50
8.
The option for 6-pack of student tickets will be of lesser cost than that of individual cost.
What is multiplication of two numbers?
Multiplication is a way of finding the product of two or more numbers. It is one of the basic mathematical operations, that we use in our day to day life.
Given, total number of students= 6
Cost of individual student ticket= $21.50
Therefore, total cost of buying tickets to an adventure day= $(6×21.5)= $129.00
Now, cost of 6-pack of student tickets= $126.00
Thus by comparing the two costs, we can see that the lesser option between the two is the 6-pack of student tickets by $(129-126)= $3
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What is the simplified value of the expression
O
O
The factored equation y=(x−1)(x−5)(x+7) has zeros (or x-intercepts).
The zeros of the factored form of the equation is x = 1, 5, and -7.
What is Factorization ?
Factorization is the method of breaking a number into smaller numbers that multiplied together will give that original form. Factorization is expressing a mathematical quantity in terms of multiples of smaller units of similar quantities.
We have been given the factored equation as; y=(x−1)(x−5)(x+7) that has zeros (or x-intercepts).
y=(x−1)(x−5)(x+7)
then the roots of the equation;
For (x−1)
x - 1 = 0
x = 1
For (x−5)
x - 5 = 0
x = 5
For (x+ 7)
x + 7 = 0
x = -7
Hence, The zeros of the factored form of the equation is x = 1, 5, and -7.
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No Spamming or will report! Will give Brainliest. Must have explanation
Find four consecutive even integers such that the least plus twice the greatest equals 264
The four consecutive integers in the question are; 51, 52, 53, 54
What is the Sum of the Integers?Let the four consecutive integers in the question be;
x, x + 1, x + 2 and 2(x + 4)
Now, we are told that the sum of these four consecutive integers is 264. Thus;
x + x + 1 + x + 2 + 2(x + 3) = 264
Expanding the bracket gives;
3x + 3 + 2x + 6 = 264
5x + 9 = 264
5x = 264 - 9
5x = 255
x = 255/5
x = 51
Thus;
Second integer = 51 + 1 = 52
Third integer = 51 + 2 = 53
Fourth Integer = 51 + 3 = 54
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UGH please help i just need help help
The equation in slope-intercept form of the line passing through the given points is, y = (-1/2)x + 1
A table containing values of x and y is given:
x y
-2 2
0 1
2 0
4 -1
So the points on the line are:
(-2,2), (0,1), (2,0) and (4,-1)
The equation in slope-intercept form of a line is,
y = mx + c,
where m is the slope of the line and c, the y-intercept of the line.
So we need to find the slope and the y-intercept of the line from the given table values.
Let (x₁, y₁) = (-2,2) and (x₂, y₂) = (0,1).
Then slope of the line, m = (y₂-y₁)/(x₂-x₁)
= (1-2)/(0- -2)
= -1/2
The y-intercept of a line is the y-co-ordinate of the point which intersect the y-axis. I.e., it is the y-co-ordinate of the point at which x = 0.
From the table, when x = 0, y = 1.
Hence the y-intercept, c = 1.
So finally, the equation in slope-intercept form of the line is,
y = (-1/2)x + 1
The question is incomplete. Find the complete question below:
Find an equation in slope-intercept form of the line that passes through the given points.
x y
-2 2
0 1
2 0
4 -1
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The cookie jar contains three types of coolcies: chocolate chip, sugar and oatmeal. There are 3 times as many chocolate chip as sugar cookies, and 12 more oatmeal than chocolate chip. If there are 54 cookies in the jar, how many oatmeal cookies are there?
By solving equations, we can conclude that there are 30 oatmeals in the jar.
What are equations?A mathematical equation is a formula that uses the equals sign to represent the equality of two expressions. A mathematical statement known as an equation is made up of two expressions joined together by the equal sign. A formula would be 3x - 5 = 16, for instance. When this equation is solved, we discover that the value of the variable x is 7.So, a number of oatmeals are in the jar.
Let, sugar cookies be 'x'.Chocolate chips are '3x'.Oatmeals be '3x + 12'The total number of cookies is 54.
From the equation:
x + 3x + 3x + 12 = 54Now, solve for 'x' as follows:
x + 3x + 3x + 12 = 547x + 12 = 547x = 54 - 127x = 42x = 42/7x = 6Number of oatmeals when "x = 6':
3x + 123(6) + 1218 + 1230Therefore, by solving equations, we can conclude that there are 30 oatmeals in the jar.
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use the graph to determine wither the function is even, oddPlease check photo
EXPLANATION:
Given;
We are given a graph of a function.
Required;
We are required to determine from the graph if the function is even, odd or neither even nor odd.
Solution:
To determine this from a graph, we should note that a function which is symmetrical with the y-axis is an even function. The graph which is symmetrical with the origin after a 180 degree rotation is an odd function.
Observe that if this graph is flipped from left to right (across the y-axis), it would not retain its original shape.
However, if the graph is rotated 180 degrees about the origin, it would retain its original shape.
Therefore, the graph depicted is an odd function
ANSWER:
The function is an ODD function
Find the general form of an equation of the line through the point A that satisfies the given condition.
A( -4, 2)
a) parallel to the x-axis.
b) perpendicular to the x-axis.
The general form of equation a) y = 2, b) x = -4.
Here the point A = (-4,2)
a) we have to find the equation parallel to the x-axis
As a line should be parallel to x axis so it must pass from y-axis. As the coordinate of A is (-4, 2) so by this we get y = 2 and x = -4.
But we have to put the value of x as 0 and y = 2 then only we get an equation of a line parallel to x-axis.
So y = 2
which is parallel to x-axis
b) equation of a line perpendicular to the x-axis.
As a line should be perpendicular to x-axis, so line should pass form the x-axis and not with the y-axis. As point A is (-4. 2), so we have to take the value of x = -4 and y = 0. So we get an equation.
x = -4 is the general equation.
Therefore the general equation a) y =2 and b) x =-4.
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Simplify: 10x-5y+2x-3y
Answer: 12x-8y
- Hope this helped.
Answer:
12x-8y
Step-by-step explanation:
combine 10x and 2x
the combine (-5y) and (-3y)
4. What does the ordered pair (0, 0) represent in this situation?
May you guys/girls please help me I have to submit this before mid night and I do not fail because my parents will get me , so may y'all please help me out!?
Answer:
Answer down below!
Step-by-step explanation:
Let's start off by finding a point in the graph where we can start off on
This point that we can use it (0,-3)
From there, we use rise/run to find the slope
We go up 1 and over 1
Thus, our slope is 1!
Given m n, find the value of x and y
Answer:
x=24
y=58
Step-by-step explanation:
5x+20=6x-4
5x-6x=-20-4
-x=-24 /:(-1)
x=24
5×24+20+y-18=180
122+y=180
y=180-122
y=58
if anyone knows please help me on this
Answer:
d 138
Step-by-step explanation:
<5 is vertical to <2, so they are congruent.
<2 is corresponding to the 138° angle, so they are congruent.
m<5 = m<2 = 138°
Answer: d 138
a rectangular tennis court has an area of 528 m^2. If the length is decreased by 1 m and the width is increased by 1 m, the area of the tennis court is increased by 16 m^2. Find the perimeter in metres. thanks
The perimeter of the rectangular tennis court is 96.7 m
How to solve an equationAn equation shows the relationship between two or more numbers and variables.
Let x represent the length and y represent the width. A rectangular tennis court has an area of 528 m², hence:
Area = length * width
528 = xy
y = 528/x
If the length is decreased by 1 m and the width is increased by 1 m, the area of the tennis court is increased by 16 m². Hence:
new area = new length * new width
528 + 16 = (x - 1)(y + 1)
xy + x - y + 1 = 544
x(528/x) + x - 528/x + 1 = 544
528 + x - 528/x + 1 = 544
multiplying through by x:
528x + x² - 528 + x = 544x
x² -15x - 528 = 0
x = 31.67, hence y = 528/31.67 = 16.67
Perimeter = 2(x + y) = 2(31.67 + 16.67)
Perimeter = 96.7 m
The perimeter is 96.7 m
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4. If 24 cans of soup will feed 72 people, how many cans are
needed to serve 39 people?
Answer:
24 cans=72 people
1 people = 24÷72 cans
39 people = 24÷72×39 cans
=13 cans
more than 2x10 to the second power workers were involved in building the Taj Mahal. which number shows another way to express 2x10 2sec power
Answer:
Step-by-step explanation:
ewerwerer
Question 7 , 8 Geometry
Answer:
i believe the answer is the distributive property
Which of the following statements best describes a survey question?
A question you will ask the people in your sample.
A question designed to collect a single datum.
A multiple choice question.
A question designed to obtain customer feedback.
Answer:
A question you will ask the people in your sample.
Solve for x
x+5=15
D
B
A
The value of x in the given figure is 10.
What is Pythagoras' Theorem?The Pythagorean theorem, sometimes known as Pythagoras' theorem, is a fundamental relationship between a right triangle's three sides in Euclidean geometry.According to this statement, the areas of the squares on the other two sides add to the area of the square whose side is the hypotenuse.In the given triangle,
∠ADC = ∠BDC = 90°
Hence the triangles ΔACD and ΔBCD are right-angle triangles. Thus we can apply Pythagoras' theorem in both triangles.
So in ΔACD,
CB² = BD² + DC²
And in ΔBCD,
CA² = AD²+ DC²
But, CA = 15 and CB = x + 5
So, (x + 5)² = BD² + DC²
15² = AD² + DC²
⇒225 = AD² + DC²
Here, BD = AD as given in the figure
Replacing BD with AD in the first equation we get,
(x + 5)² = AD² + DC²
Now, equate the values of AD² + DC² to obtain the value of x,
(x + 5)² = 225
⇒ x² + 25 + 10x = 225
⇒ x² + 10x - 200 = 0
⇒ x² + 20x - 10x - 200 = 0
⇒x(x + 20) - 10(x + 20) = 0
⇒(x + 20)(x - 10) = 0
Thus x = -20, 10
Hence the value of x is 10.
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40 points!!! Please answer asap!!!
Answer:
There is a linear relationship between costumes and fabric. The rate of change is 3 1/2 yards per costume.
Step-by-step explanation:
The second possible answer is correct,
3 and 1/2
brailiest would be appreciated :]
Answer: The correct answer is B. There is a linear relationship between the number of costumes and fabric. The rate of change is 3.5 yards per costume.
Step-by-step explanation:
Divide the Fabric yards by the number of costumes:
7 / 2 = 3.5
14 / 4 = 3.5
21 / 6 = 3.5
28 / 8 = 3.5
Since they are all 3.5 yards per costume, the relationship is LINEAR
how many squares whose sides are parallel to the axes and whose vertices have coordinates that are integers lie entirely within the region bounded by the line y
26
Write the time.
11 12
10
87
Solve the quadratic equation x2 + 3x = 40 using the quadratic formula.
A)
x = –8, x = 5
B)
x = 5, x = 8
C)
x = –5, x = 8
D)
x = –8, x = –5
After solving the quadratic equation x² + 3x = 40 using the quadratic formula, (A) x = –8, x = 5
We can solve this quadratic formula by following a few steps.
The given equation is,
x² + 3x =40
Let's subtract 40 from both sides,
x² + 3x - 40 =40 - 40
Or, x² + 3x - 40 = 0
Now, we have to find a suitable pair of factors of -40 which is capable to generate +3 ( coefficient of x ).
The required pair is 8 and -5, and ( 8 - 5 ) = 3
[ -40 = 8 × -5 ]
Therefore, x² + 3x - 40 = 0
Or, x² + ( 8 - 5 )x - 40 = 0
Or, x² + 8x - 5x - 40 = 0
Or, x ( x + 8 ) - 5 ( x + 8 ) = 0 [ taking x and 5 as common ]
Or, ( x + 8 ) ( x - 5 ) = 0 [ taking ( x + 8 ) as common ]
If the multiplication or product of two or more terms is zero, then we can write each term as zero.
Hence we can write,( x + 8 ) = 0
Or, x = -8 ( by subtracting 8 from both sides )
Again we can write,( x - 5 ) = 0
Or, x = 5 ( by adding +5 with both sides )
Now, we can conclude that x = -8 and 5.
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Need help with this problem √-5
In the diagram below, the three lines intersect in the same point,
forming six numbered angles
Answer:
A , B, D, F
Step-by-step explanation:
A) ∠1 ≅ ∠ 4 {Vertically opposite angles are congruent}
B) m∠2 + ∠4 + ∠6 = 180° {Straight line angles}
∠6 ≅ ∠3
⇒ ∠2 + ∠4 + ∠3 = 180°
D) ∠2 + ∠3 + ∠4 = 180° {Straight line angles}
f) ∠2 + ∠3 = ∠5 + ∠6 {Vertically opposite angles}
Please helppp immediately
A function is a relationship between inputs where each input is related to exactly one output.
The outputs are called the range
The range of the function:
R = {-1, 0, 3}
Option C is the correct answer.
What is a function?A function is a relationship between inputs where each input is related to exactly one output.
A function has an input and an output.
Example:
f(x) = x + 1
f(1) = 1 + 1 = 2
Input = domain = 1
Output = range = 2
We have,
Function:
y = x² - 1
The domain of a function = {-2, -1, 0, 1, 2 }
Let y = f(x)
x = -2, -1, 0, 1, 2.
f(-2) = 4 - 1 = 3
f(-1) = 1 - 1 = 0
f(0) = 0 - 1 = -1
f(1) = 1 - 1 = 0
f(2) = 4 - 1 = 3
Thus,
The range of the function:
R = {-1, 0, 3}
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Question: Is it x = 6 or x = 58/9?
Problem: 3(x-5)+2(3x-1)=41
Solve X.
Answer:
58/9 = x
Step-by-step explanation:
3(x-5) + 2(3x-1) = 41
Expand:
(3x-15) + (6x-2) = 41
Simplify:
9x-17 = 41
9x = 58
x = 58/9
Hope that helps